New Oxygen Sensors...New code (136)

[SHOByrds]

First i had the code 172 ((R,M) Oxygen sensor not switching - system is or was lean - Single, Right orr Rear HO2S - Fuel control.)......

I put new O2 sensors in, and 172 still came up along with the code 136 (R) Oxygen sensor not switching/system lean Left or Front HO2S - Fuel control

Any help would be appriciated

(i reset the codes by unplugging battery before running test again)

 

[rubydist]

that means you are getting more air than the pcm is being told. this can be due to a significant vacuum leak, or a bad or dirty mafs.

I would check carefully for vacuum leaks - they can be hard to find because old, hard vacuum hoses can leak a lot. And, I would clean the mafs. Then, reset codes again and drive another couple days to see what pops up.

 

[SHOByrds]

Thanks